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Updated: May 4, 2026

Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia
06:19

Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia

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Ocular aberrations in amblyopic children

Hind Ibrahem Aldebasi1, Samah Mahmoud Fawzy2, Ahmad A Alsaleh3

  • 1Lecturer, Optometry Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.

Saudi Journal of Ophthalmology : Official Journal of the Saudi Ophthalmological Society
|December 28, 2013
PubMed

Insights

Ocular aberrations in amblyopic children are primarily lower-order, correctable optically. Higher-order aberrations do not explain why refractory amblyopia resists treatment, suggesting central processing issues.

Area of Science:

  • Ophthalmology
  • Optometry
  • Pediatric Vision

Background:

  • Amblyopia, or
  • lazy eye
  • is a developmental disorder affecting visual acuity.
  • Understanding ocular aberrations is crucial for diagnosing and treating amblyopia.
  • Previous research has explored various factors contributing to amblyopia, but the role of specific aberration types requires further investigation.

Purpose of the Study:

  • To investigate the pattern of ocular aberrations in children diagnosed with amblyopia.
  • To explore the relationship between ocular aberration patterns, the etiology of amblyopia, and treatment outcomes.
  • To differentiate aberration profiles in newly diagnosed, treated, and refractory amblyopic eyes.

Main Methods:

  • Wavefront aberrometry (WaveScan) was used to measure ocular aberrations in 75 eyes of 60 children (ages 5-14).
  • Participants were categorized into four groups: emmetropic controls, pre-treatment amblyopes, treated amblyopes, and refractory amblyopes.
  • Cyclopentolate eyedrops were used to achieve cycloplegia before measurements.

Main Results:

  • Amblyopic eyes exhibited significantly higher root mean square (RMS) values for total eye aberrations, second-order aberrations, defocus, and astigmatism compared to emmetropic eyes.
  • Refractory amblyopic eyes showed significant differences in total RMS, second-order aberrations, defocus, and astigmatism compared to treated amblyopic eyes.
  • Higher-order aberrations (HOAs) did not significantly differ between most amblyopic groups and controls, except for a specific fifth-order RMS difference in pre-treated amblyopes.

Conclusions:

  • Lower-order aberrations are the primary contributors to reduced retinal image quality in amblyopia and can be optically corrected.
  • The study of higher-order aberrations did not elucidate the non-responsiveness of refractory amblyopia to orthoptic treatments.
  • Findings suggest that central visual processing and binocular interaction issues are likely the main causes of refractory amblyopia.
Abstract

Keywords:
AmblyopiaOcular aberrationsWavefront opticsZernike polynomials

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